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mohammedshareef_cp 2008-03-21 23:04:00 +00:00
parent 91066ec8cd
commit 16632ec66c
2 changed files with 103 additions and 93 deletions
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103
source/Cosmos.Kernel.FileSystems/MBT.cs Normal file
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using System;
using System.Collections.Generic;
using Cosmos.Hardware;
using System.Runtime.InteropServices;
namespace Cosmos.Kernel.FileSystems {
public static class MBT {
private class MBTPartition: BlockDevice {
private readonly BlockDevice mBackend;
private readonly ulong mBlockStart;
private readonly ulong mBlockCount;
private readonly string mName;
public MBTPartition(BlockDevice aBackend, ulong aBlockStart, ulong aBlockCount, string aName) {
mBlockStart = aBlockStart;
mBlockCount = aBlockCount;
mBackend = aBackend;
mName = aName;
}
public override uint BlockSize {
get {
return mBackend.BlockSize;
}
}
public override ulong BlockCount {
get {
return mBlockCount;
}
}
private ulong GetActualBlock(ulong aBlock) {
return aBlock;
}
public override byte[] ReadBlock(ulong aBlock) {
return mBackend.ReadBlock(GetActualBlock(aBlock));
}
public override void WriteBlock(ulong aBlock, byte[] aContents) {
mBackend.WriteBlock(GetActualBlock(aBlock), aContents);
}
public override string Name {
get {
return mName;
}
}
}
public static void Initialize()
{
//DebugUtil.SendMessage("MBT", "Initializing");
//DebugUtil.SendNumber("MBT", "DeviceCount", (uint)Device.Devices.Count, 32);
Device.Devices.ForEach(delegate(Device d)
{
addDevice(d as BlockDevice);
});
}
private static void addDevice(BlockDevice xBlockDev)
{
if (xBlockDev == null)
return;
int xContentsIndex = 0x1BE;
//DebugUtil.SendMessage("MBT", "Found Device");
byte[] xBlockContents = xBlockDev.ReadBlock(0);
// detecting whether MBT or not
//DebugUtil.SendNumber("MBT", "xBlockDev.BlockSize", xBlockDev.BlockSize, 32);
//DebugUtil.SendDoubleNumber("MBT", "Last bytes of block", xBlockContents[510], 8, xBlockContents[511], 8);
if (!(xBlockContents[xBlockDev.BlockSize - 2] == 0x55 && xBlockContents[xBlockDev.BlockSize - 1] == 0xAA))
{
//DebugUtil.SendMessage("MBT", "Does not contain MBR");
//Hardware.DebugUtil.SendATA_BlockReceived(255, 255, 0, xBlockContents);
return;
}
for (byte j = 0; j < 4; j++)
{
//DebugUtil.SendNumber("MBT", "Partition Status", xBlockContents[xContentsIndex], 8);
if (!(xBlockContents[xContentsIndex] == 0x80 || xBlockContents[xContentsIndex] == 0))
{
xContentsIndex += 16;
continue;
}
xContentsIndex += 8;
uint xStart = BitConverter.ToUInt32(xBlockContents, xContentsIndex);
xContentsIndex += 4;
uint xLength = BitConverter.ToUInt32(xBlockContents, xContentsIndex);
xContentsIndex += 4;
if (xStart > 0 && xLength > 0)
{
//DebugUtil.SendDoubleNumber("MBT", "Entry Found. Start, Length in blocks", xStart, 32, xLength, 32);
xStart += 2;
Console.WriteLine("Add Partition to Device list");
Device.Add(new MBTPartition(xBlockDev, xStart, xLength, "Partition"));
//DebugUtil.SendMessage("MBT", "FoundPartition");
}
}
}
}
}

93
source/Cosmos/Cosmos.Kernel/New/Partitioning/MBT.cs
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@ -1,93 +0,0 @@
using System;
using System.Collections.Generic;
using Cosmos.Hardware;
using System.Runtime.InteropServices;
namespace Cosmos.Kernel.New.Partitioning {
public static class MBT {
private class MBTPartition: BlockDevice {
private readonly BlockDevice mBackend;
private readonly ulong mBlockStart;
private readonly ulong mBlockCount;
private readonly string mName;
public MBTPartition(BlockDevice aBackend, ulong aBlockStart, ulong aBlockCount, string aName) {
mBlockStart = aBlockStart;
mBlockCount = aBlockCount;
mBackend = aBackend;
mName = aName;
}
public override uint BlockSize {
get {
return mBackend.BlockSize;
}
}
public override ulong BlockCount {
get {
return mBlockCount;
}
}
private ulong GetActualBlock(ulong aBlock) {
return aBlock;
}
public override byte[] ReadBlock(ulong aBlock) {
return mBackend.ReadBlock(GetActualBlock(aBlock));
}
public override void WriteBlock(ulong aBlock, byte[] aContents) {
mBackend.WriteBlock(GetActualBlock(aBlock), aContents);
}
public override string Name {
get {
return mName;
}
}
}
public static void Initialize() {
DebugUtil.SendMessage("MBT", "Initializing");
DebugUtil.SendNumber("MBT", "DeviceCount", (uint)Device.Devices.Count, 32);
for (int i = 0; i < Device.Devices.Count; i++) {
var xDevice = Device.Devices[i];
var xBlockDev = xDevice as BlockDevice;
if (xBlockDev == null) {
continue;
}
DebugUtil.SendMessage("MBT", "Found Device");
var xBlockContents = xBlockDev.ReadBlock(0);
// detecting whether MBT or not
DebugUtil.SendNumber("MBT", "xBlockDev.BlockSize", xBlockDev.BlockSize, 32);
DebugUtil.SendDoubleNumber("MBT", "Last bytes of block", xBlockContents[510], 8, xBlockContents[511], 8);
if (!(xBlockContents[xBlockDev.BlockSize - 2] == 0x55 && xBlockContents[xBlockDev.BlockSize - 1] == 0xAA)) {
DebugUtil.SendMessage("MBT", "Does not contain MBR");
Hardware.DebugUtil.SendATA_BlockReceived(255, 255, 0, xBlockContents);
continue;
}
int xContentsIndex = 0;
xContentsIndex = 0x1BE;
for (byte j = 0; j < 4; j++) {
DebugUtil.SendNumber("MBT", "Partition Status", xBlockContents[xContentsIndex], 8);
if (!(xBlockContents[xContentsIndex] == 0x80 || xBlockContents[xContentsIndex] == 0)) {
xContentsIndex += 16;
continue;
}
xContentsIndex += 8;
uint xStart = BitConverter.ToUInt32(xBlockContents, xContentsIndex);
xContentsIndex += 4;
uint xLength = BitConverter.ToUInt32(xBlockContents, xContentsIndex);
xContentsIndex += 4;
if (xStart > 0 && xLength > 0) {
DebugUtil.SendDoubleNumber("MBT", "Entry Found. Start, Length in blocks", xStart, 32, xLength, 32);
xStart += 2;
Console.WriteLine("Add Partition to Device list");
Device.Add(new MBTPartition(xBlockDev, xStart, xLength, "Partition"));
DebugUtil.SendMessage("MBT", "FoundPartition");
}
}
}
}
}
}